EXTINCT CATS. 2S5 



IV. GENUS EUSMILUS. 



Ensmihis, Gervais, Zool. et Pal. Gen. ser. 2, p. 53 (1876) ; 



Lydekker, Cat. Foss. Mamm. Brit. Mus. pt. v. p. 310 



(1887). 

 This genus agrees with the preceding in the general structure 

 of the lower jaw and the large size of the upper canine teeth ; 

 but differs in the excessive depth of the descending flange-like 

 expansion at the front of the lower jaw, and also in having 

 only two pairs of lower incisor teeth. It is further characterised 

 by the small size of the front lobe of the blade of the upper 

 carnassial tooth, as well as in the presence of a small posterior 

 heel to the corresponding lower tooth, the latter feature affiliat- 

 ing it to the more generalised members of the Family. The 

 genus is known only by E. bidentatus from the Upper Eocene 

 (Oligocene) Phosphorites of Central France. 



V. GENUS ^LURICTIS. 



AZhirogale, Filhol, Ann. Sci. Geol. vol. iii. art. 7, p. 14(1872) 



nee Fitzinger. 

 Ailurietis, Trouessart, Bull. Soc. Angers, vol. xv. Cat. Mamm. 

 p. 92 (1885). 

 With this genus we come to the first of several genera of 

 Cat-like Mammals agreeing with Afaehcerodus in the possession 

 of elongated and compressed upper canine teeth protected by 

 a flange-like expansion of the lower jaw, and likewise by the 

 angulated front surface of the latter ; but differing in several 

 important structural features indicative of more generalised 

 affinities. In the first place, the upper carnassial tooth has 

 only two (instead of three) lobes to its cutting blade, while the 

 corresponding lower tooth has always a well-developed posterior 

 heel. Further, the upper molar is placed more or less poste- 

 riorly to the carnassial, instead of on its inner side, and a 

 small second lower molar is generally retained behind the 

 lower carnassial tooth. There are likewise usually three, in- 

 stead of two, lower pre-molar teeth. Differences also obtain in 



